.box {
  background-color: blue;
  width: 400px;
}

.exp {
  width: 100px;
}

div :nth-child(1) {
  width: 1px;
}

div :nth-child(2) {
  width: 1px;
}

div :nth-child(3) {
  width: 1px;
}

div :nth-child(1) {
  width: 1px;
}

div :nth-child(2) {
  width: 1px;
}

li {
  width: 200px;
}

li {
  width: 400px;
}

li {
  width: 600px;
}

li {
  width: 800px;
}

div {
  width: 30px;
}

div {
  width: 100px;
}

div p {
  width: 50px;
}

body div {
  background-color: blue;
}

.base, .one, .two {
  width: 100px;
  height: 100px;
}

.one {
  width: 200px;
}

.two {
  width: 10px;
}

div {
  width: 60px;
}
